In this paper, we discuss table tennis technique evaluation using motion analysis model by TAM networks and data mining methods. For students of university, we recorded the continuous forehand stroke of the table tennis in the video frames, and analyzed the trajectory pattern of nine marking points attached at subject's body with a coach's technique evaluation and the motion analysis model. As a result, we obtained embodied knowledge classified member of table tennis club, middle level player and beginner as fuzzy rules, and also estimated the movement of the marking points to improve in table tennis technique.

The purpose of this study is to make a trial to develop for a quantitative evaluation for motion analysis with a 3D motion analysis device by comparing the characteristics of three dances. We measured the trajectory of the pelvis of skilled dancers of Bali-dance, ballet and Uighur-dance. The result demonstrated the characteristics of the gait motion of each dance. In addition, comparing the trajectories with the normal gait, the skills of the dances were clearly showed.

Physical tacit knowledge is the way of acquiring the abilities to move our body by trial and error. Understanding of the relationship between body segments plays a key role in order to encourage learning the physical tacit knowledge. This study utilized the visualization as the tool for understanding its relationship.

The present study investigated the expert-novice difference in the kinetics of upper-limb movement during the keystroke on the piano. Kinematic recordings were made while experts (N = 7) and novices (N = 7) of classical-piano players performed a right hand octave keystroke with staccato articulation to produce four different sound dynamics. Using the inverse dynamics method, interaction and muscular torques generated at the shoulder, elbow and wrist joints were computed. At all sound dynamics, the experts produced larger interaction torques at the elbow and wrist joints compared to the novices, and thereby had smaller muscular torques at these joints. This suggests that through the long-term piano training the expert pianists acquired motor skill of reducing muscular load during the keystroke by effectively exploiting the interaction torques.

This study was conducted to obtain some invariant variables in coaching of pitching from seven expert coaches and four former professional baseball pitchers. They were requested to expound their views on movement of pitching of some pitchers who was videotaped, and answered questionnaire on movement of pitching and psychometric tests by means of a paired comparison method using computer graphics. The followings were representative of invariant variables: 1) whole body coordination including rhythm and timing, 2) pressing and twisting of standing leg, 3) weight shift, 4) pelvis and trunk rotation during transfer phase from linear movement to rotational movement 5) movement and trajectory of throwing arm. Expert high school coaches more paid attention to the throwing arm. On the other hand, the former professional baseball players more paid attention to the trunk and the lower extremities. On shoulder horizontal abduction/adduction during take-back phase, both groups had different opinion.